After I spent a week in California (I'm from Boston), I came back with some weird looking stuff under my eyes from getting burned the first day I was there. I figured it would go away on its own. It didn't. I freaked out and was about to make a doctor's appointment to make sure it wasn't precancerous, and I later found out it was solar dermatitis on my own.
I'm a 24 year old healthy male. I have an aloe plant at home so I started using it. It didn't work that great alone, but I combined it with natural shea (putting the aloe on first then the shea) and it helped incredibly. It's only been about a week since I've been doing this and the sun rash is nearly gone. Before that, it was really stubborn. Weeks went by and it was still there, redder than ever.
So give this a shot. Best of all, it's cheap. An aloe plant is great to have in the windowsill and will only run you a few dollars. You can get pure shea butter for around 5 dollars and both are a really good, natural, non-comedogenic moisturizer. I figured I'd post as I've learned so much from the web. Good luck to anyone reading this and have faith!